1. Billions of far-away stars are much bigger than our Sun.
(Is this statement correct? What is the meaning of 'billions of far-away stars'?")
2. What if I look like a fool in front of people?
(What is the full form of "What if...? Is it #3? Or do you have some more suitable expressions?)
3. What should I do if I look like a fool in front of people?
Many distant stars are much bigger than the sun.
Number 3 is a good answer to number 2.